Improvement in winding- watches



@wat (twine.

A. ETIENNE GUYOT, OF

RENAU, SWITZERLAND.

Lette/rs Patent No. 101,859, dated .April l2, 1870.

IMPROVEMENT IN WINDIN G WATCHES.

The Schedule referred to in these Letters Patent and making part. ci the same.

To, all whom it may conce/rn Be it known that I, A. ETIENNE GUYOT, of Renan, in the canton of Bern, Switzerland, have invented an Improvement in finding Watches, of which the foilowing is declared to be a correct specification.

This invention relates to winding the watch by a motion derived from the rotation of the back of the case, whereby the opening of the case is rendered unnecessary, dust is excluded, sufficient power is easily obtained, and there are no small parts that are liable to be broken.

In the accompanying drawing- Figure 1 represents lthe watch with the face re` moved;

Figure 2 is a vertical transverse section through the watch and pendant or shank; and

Figure 3 represents the back of the watch with the outer case removed.

The mainspring is in the middle of the watch, and its arbor a projects through the back-plate b, centrally of the watch, and receives the ratchet-wheel c that is retained lby the pawl d as the watch is wound.

Upon the end of this arbor a is the winding-wheel e, that is connected to the ratchethwheel c by the. circular pawl f, that is attached at one end to this ratchet-wheel c, and provided with an inclined tooth near clude the dust, but at thesame time the back can. be turned around freely, and friction-rollers or disks maybe applied'at k kk, to causethe back y to turn freely. It is now to be understood that when the back g is turned the wheelY e is revolved by thc stud 3, and if it moves in one direction it'winds up the watch-spring while turning the ratchet-wheel c.

If the winding is not arrested when the proper number of 'turns have been given, the Stopping of the arbor or the increased power of the spring'causes the pawl f to slip out of .one of the notches, so that nothing will befbroken even if the movement is continued; otherwise, the baci; being large, and having leverage over the other parts, injury might result to some of them.

If the back is turned the other way, the pawi f runs freely over the edgeof the winding-wheel e.

The arrangement of the train of wheels tothe balance and to the hands may be of any desired character. The setting-mechanism consists of a stud, t, passing through the pendant or shank m, and retained by a screw, 5, taking a collar or neck on the stud, but allowing it to turn freely. v

Upon this stud i is a pinion, u, fitted to slide thereon by means of the spring p and push-pin r, so as to gear -into the wheel s that moves the hands.

The spring 1J keeps the pinion u away from the wheel s, except when the pin r is pushed in.

v This improvement dispenses with hinges to the case, keeps dust out of the works, and. the winding and setting devices are always in place.

I claim as my inventionl 1. The winding-wheel e, with the cavities 2 2, in combination with the back-plate!) and inwardly-projecting stud 3, as and for the purposes specified.

2. The Windingwheel e, ratchet-wheel c, and pawls f and d, in combination with the revolving back gand stud 3, substantially as set forth.

In witness whereof I have set my signature this 16th day of October, A. D. `1869.

Witnesses:` A. ETIENNE GUYOT.

OHAs. H. UPcroN, OHAs. E. JACOB. 

